This is the 2799th most frequent Russian word.
предварительно
"Предварительно" means "preliminarily" or "in advance."
The word 'предварительно' is used here to describe the timing of the action relative to another event, indicating that it was done in advance.
Мы отправили документы предварительно для проверки.
We sent the documents beforehand for review.
In this sentence, 'предварительно' describes an action that ensures preparation or confirmation preceding a main event.
Информацию о встрече предварительно уточнили.
The information about the meeting was preliminarily clarified.
Here, 'предварительно' modifies the verb 'изучив' to imply prior completion of an activity to prepare for another.